Ajs 18S vs Suzuki GSF600

The Ajs 18S passes its MOT first time more often than the Suzuki GSF600 — 92.8% vs 77.3%, a 15.5-point lead.

MOT reliability, side by side

first-time pass rate, outright fail rate and tests analysed · 2005–2025

Metric	Ajs 18S	Suzuki GSF600
First-time pass rate	92.8%	77.3%
Outright fail rate	3.0%	14.2%
Median miles at test	14,829	21,080
MOT tests analysed	598	143,023
Most common failure	lighting and signalling	brakes

First-time outcomes on normal tests, 2005–2025. "Most common failure" is the component group with the most recorded defects on failed tests. Read pass rates against test counts: a smaller sample is noisier. Source: DVSA anonymised MOT results.

AJS 18S 92.8% pass · 598 tests SUZUKI GSF600 77.3% pass · 143k tests

See each bike's full report — trend, mileage curve, failure breakdown and rivals — on its own page.